British Summer Time Begins 2025. From sydney to mumbai to nairobi, communities around the world began welcoming 2025 with spectacular light shows, embraces and ice. The period when the clocks are 1 hour ahead is called british summer time (bst).

British summer time is a mechanism to make the most of increased summer daylight hours in the northern hemisphere. Information about how the clocks change in the united kingdom between greenwich mean time (gmt) and british summer time (bst) plus a list of daylight saving times for the next few years.